205206164 has 6 divisors (see below), whose sum is σ = 359110794. Its totient is φ = 102603080.

The previous prime is 205206163. The next prime is 205206187. The reversal of 205206164 is 461602502.

It can be written as a sum of positive squares in only one way, i.e., 202834564 + 2371600 = 14242^2 + 1540^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205206163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25650767 + ... + 25650774.

It is an arithmetic number, because the mean of its divisors is an integer number (59851799).

Almost surely, 2^205206164 is an apocalyptic number.

It is an amenable number.

205206164 is a deficient number, since it is larger than the sum of its proper divisors (153904630).

205206164 is a wasteful number, since it uses less digits than its factorization.

205206164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51301545 (or 51301543 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 205206164 is about 14325.0188132512. The cubic root of 205206164 is about 589.8344493863.

Adding to 205206164 its reverse (461602502), we get a palindrome (666808666).

The spelling of 205206164 in words is "two hundred five million, two hundred six thousand, one hundred sixty-four".